Reidemeister Moves
In the 1930s, Reidemeister first rigorously proved that Knots exist which aredistinct from the Unknot. He did this by showing that all Knot deformations can be reduced to a sequence ofthree types of ``moves,'' called the (I) Twist Move, (II) Poke Move, and (III) Slide Move.
Reidemeister's Theorem guarantees that moves I, II, and III correspond to Ambient Isotopy (moves II and IIIalone correspond to Regular Isotopy). He then defined the concept of Colorability, which isinvariant under Reidemeister moves.
See also Ambient Isotopy, Colorable, Markov Moves, Regular Isotopy, Unknot- Helmholtz Differential Equation--Oblate Spheroidal Coordinates
- Helmholtz Differential Equation--Parabolic Coordinates
- Helmholtz Differential Equation--Parabolic Cylindrical Coordinates
- Helmholtz Differential Equation Polar Coordinates
- Helmholtz Differential Equation--Prolate Spheroidal Coordinates
- Helmholtz Differential Equation--Spherical Coordinates
- Helmholtz Differential Equation--Spherical Surface
- Helmholtz Differential Equation--Toroidal Coordinates
- Helmholtz's Theorem
- Helson-Szegö Measure
- Hemicylindrical Function
- Hemisphere
- Hemispherical Function
- Hempel's Paradox
- Hendecagon
- Henneberg's Minimal Surface
- Hensel's Lemma
- Henstock-Kurzweil Integral
- Heptacontagon
- Heptadecagon
- Heptagon
- Heptagonal Number
- Heptagonal Pyramidal Number
- Heptahedron
- Heptakaidecagon